Die for forming grooved metal bars



(No Model.)

W. A. M-cCOOL DIE FOR PORMING'GROOVED METAL BARS, N0. 364,125. I Patented May- 31, 1887.

WlT/VESSES: IIVVEIVTOI? JMWMQ Y UNITED STATES PATENT CFFICE.

vvILLiAM A. neooonfor PERRYSVILLE, OHIO.

DIE FOR FORMING GROOVE'D M ETAL'BARS.

SPECIFICATION forming part of Letters Patent No. 364,125, dated May 31, 1887.

Application filed September 29, 1886. Serial No. 214,827. (No model.)

To all whom it may concern.-

Be it known that I, WILLIAM A. MoOooL, a citizen of the United States, residing at Perrysville, 'Ashland county, State of Ohio, haveiuvented a new and useful Improvement in Dies for Forming Grooved Metal Bars, and more especially adapted to the manufacture of the peculiar form of grooved metal rod shown in Letters Patent No. 328,797, granted to me October 20, 1885, of which the following is a specification.

The object of my invention is to providea die that will turn up the edges of a strip of metal drawn through it and form therefrom a grooved rod of perfect uniformity and finish with the least possible friction and wear upon either die or rod. I accomplish this result by constructing my die or'former as shown. The interior is convexly curved, terminating at the exit end in a small portion with sides which have become parallel lines, a tongue with a rounded edge being inserted in the upper part of the opening and held securely by a dovetail or otherwise. This die may be con structed in numerous formsinvolvi ng thesame principle.

In the drawings, Figure l is a front view of the die or former, the portion in full block in- B is the tongue, held by thedovetailed edge 12 to the body A v c'is the curved inner surface of the die at the reaching the true acting portion at c and becoming a portion of a cylinder at a.

d indicates the vertical sides, which begin curved at the entrance and gradually flatten out until they reach the exit end as plane surfaces. The top is flat almost immediately after leaving the entrance end of the die.

The piece of metal to be shaped is tapered and bent, so as to be easily drawn through the die by hand. It is then seized by the jaws of the grip and pulled through. Asit passes, the

sides are gradually and easily caused to take the form of a trough, until in passing out at the exit end the form is made perfectlyuniform. The curves are so designed that comparatively little friction results, as is evident to all acquainted with the art of metal-drawing.

I claim- The die for shaping or forming grooved metal rods, provided with a large opening at the receiving end, the flat top, sides, and bottom gradually converging to form the exit end, and provided with a tongue hanging vertically from the top of the die and extending longitudinally therein the full length of the die to form the groove, the sides and bottom of the die and the suspended tongue coacting to form bottom, beginning at 0 with an entrance curve the grooved metal rod, as described, and for Witnesses:

, J. F. MERRIMAN, J. P. STEWART. 

